fix: [desktop] When the content menu pops up, the input method can still be used.

1. When the wayland menu pops up, there is no focus on seizing, causing the
input method to not disappear.
2. In the Wayland mode, when the menu pops up, the input method is disabled

Log: fix issue
Bug: https://pms.uniontech.com/bug-view-259639.html

Author: GongHeng2017

src/plugins/desktop/core/ddplugin-canvas/view/canvasview.cpp

@@ -349,6 +349,8 @@ void CanvasView::contextMenuEvent(QContextMenuEvent *event)
     bool isEmptyArea = !index.isValid();
     Qt::ItemFlags flags;
 
+    if (WindowUtils::isWayLand())
+        setAttribute(Qt::WA_InputMethodEnabled, false);
     if (isEmptyArea) {
         d->menuProxy->showEmptyAreaMenu(flags, gridPos);
     } else {
@@ -359,6 +361,8 @@ void CanvasView::contextMenuEvent(QContextMenuEvent *event)
         flags = model()->flags(index);
         d->menuProxy->showNormalMenu(index, flags, gridPos);
     }
+    if (WindowUtils::isWayLand())
+        setAttribute(Qt::WA_InputMethodEnabled, true);
 }
 
 void CanvasView::startDrag(Qt::DropActions supportedActions)